(S)-4-benzyloxycarbonylamino-4-[(1S,2R)-2-(2,5-dimethoxyphenyl)-2-hydroxy-1-methyl-ethylcarbamoyl]butyric acid benzyl ester 在
palladium 10% on activated carbon
氢气 作用下,
以
甲醇 为溶剂,
以96%的产率得到(S)-4-amino-4-[(1S,2R)-2-(2,5-dimethoxyphenyl)-2-hydroxy-1-methyl-ethylcarbamoyl]butyric acid